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FSL

Rohde & Schwarz*misc

The Rohde & Schwarz FSL is a compact, lightweight spectrum analyzer designed for general-purpose RF development, production, and field service. Operating across various frequency models (up to 3 GHz, 6 GHz, and 18/20 GHz), it uniquely integrates a standard 28 MHz signal analysis bandwidth and optional battery operation, making it a highly versatile instrument in its class.

RF and MicrowaveSignal Analysis

Specifications

General

ParameterValue
Interfaces2 × USB 2.0 Host (Type A), 1 × USB 2.0 Device (Type B), LAN (RJ-45, 10/100 Base-T), VGA (D-Sub 15-pin), GPIB (optional via FSL-B10)
Display6.4" TFT color LCD, 640 × 480 pixels (VGA)

Physical

ParameterValue
Power Supply100 V to 240 V AC (50 Hz to 60 Hz / 400 Hz), 12 V to 28 V DC (optional via FSL-B30)
Operating Temperature0 °C to +50 °C
Dimensions (W×H×D)408 mm × 158 mm × 344 mm
Weight7.0 kg (without options)

Frequency

ParameterValue
Frequency Range9 kHz to 3 GHz (FSL3) / 6 GHz (FSL6) / 18 GHz (FSL18, overrange to 20 GHz)
Reference Frequency Accuracy1 × 10^-6 (standard), 1 × 10^-7 (with option FSL-B4)
Aging per Year1 × 10^-6 (standard), 1 × 10^-7 (with option FSL-B4)
Temperature Drift1 × 10^-6 (standard, 0 °C to 50 °C), 1 × 10^-7 (with option FSL-B4)
Frequency Resolution1 Hz
Span Range0 Hz, 10 Hz to 3 / 6 / 18 GHz
SSB Phase Noise (10 kHz offset)<-98 dBc (1 Hz), typ. -103 dBc (1 Hz) at 1 GHz carrier
SSB Phase Noise (100 kHz offset)<-98 dBc (1 Hz), typ. -105 dBc (1 Hz) at 1 GHz carrier
SSB Phase Noise (1 MHz offset)<-115 dBc (1 Hz), typ. -120 dBc (1 Hz) at 1 GHz carrier

Bandwidth

ParameterValue
Resolution Bandwidth (RBW) Range10 Hz to 10 MHz (1 Hz to 10 MHz with option FSL-B7)
Resolution Bandwidth (RBW) Steps1, 3, 10 sequence
Resolution Filter Shape Factor (60 dB / 3 dB)<5
Video Bandwidth (VBW) Range1 Hz to 10 MHz
Video Bandwidth (VBW) Steps1, 3, 10 sequence
FFT Filter Bandwidth Range10 Hz to 30 kHz (1 Hz to 30 kHz with option FSL-B7)

Amplitude

ParameterValue
Maximum Safe Input Level (CW)+30 dBm (1 W)
Maximum Input DC Voltage50 V
1 dB Compression Point+5 dBm (nominal, at 0 dB RF attenuation)
Displayed Average Noise Level (DANL) (without Preamp)typ. -140 dBm/Hz at 1 GHz
Displayed Average Noise Level (DANL) (with Preamp)typ. -152 dBm/Hz at 1 GHz (with option FSL-B22)
Frequency Response (Flatness)<0.5 dB (<3 GHz), <0.8 dB (<6 GHz)
Input Attenuator Range0 dB to 50 dB
Input Attenuator Steps5 dB
Second Harmonic Intercept (SHI)+40 dBm (typ. at 1 GHz)
Third-Order Intercept (TOI)typ. +12 dBm (at 1 GHz)
Amplitude Measurement RangeDANL to +30 dBm

Sweep and Trigger

ParameterValue
Sweep Time Range (Span > 0 Hz)2.5 ms to 16000 s
Sweep Time Range (Zero Span)1 µs to 16000 s
Sweep Time Accuracy0.1% (nominal)
Number of Sweep Points501 (standard), up to 32001 (user-selectable)
Sweep ModesContinuous, Single
Trigger SourcesFree Run, Video, External
Trigger Delay Range1 µs to 100 s

Measurement and Demodulation

ParameterValue
Marker FunctionsPeak Search, Next Peak, Marker to Trace, Marker Demodulation (AM/FM), Noise Marker, Frequency Counter
Detector TypesMax Peak, Min Peak, Auto Peak, Sample, RMS, Average, Quasi-Peak (with option FSL-K3)
Trace FunctionsClear/Write, Max Hold, Min Hold, Average, View
Standard Analysis FunctionsChannel Power (CP), Adjacent Channel Leakage Ratio (ACLR), Occupied Bandwidth (OBW), Spectrum Emission Mask (SEM), C/N, TOI
Analog Demodulation TypesAM, FM (audio via built-in speaker or headphone jack)
Digital Demodulation OptionsWCDMA/3GPP, WLAN 802.11a/b/g/n, WiMAX, Bluetooth (option-dependent)
Signal Analysis (Demodulation) Bandwidth28 MHz

Inputs and Outputs

ParameterValue
RF Input ConnectorN female
RF Input Impedance50 Ω (standard), 75 Ω (with option RAM/RAZ matching pad)
External Reference Input (Frequency/Level)10 MHz / -10 dBm to +10 dBm
External Reference Output10 MHz / typ. 0 dBm

Tracking Generator

ParameterValue
Tracking Generator Frequency Range9 kHz to 3 GHz / 6 GHz (option FSL-B9 dependent)
Tracking Generator Output Level Range-20 dBm to 0 dBm
Tracking Generator Output Level Resolution0.1 dB
Tracking Generator Flatness±1 dB (nominal)
Tracking Generator Impedance50 Ω

Display and User Interface

ParameterValue
Language SupportEnglish, German, French, Spanish, Russian, Chinese, Japanese, Korean

Physical and Power

ParameterValue
Power Consumptiontyp. 45 W, max. 65 W
Battery Operation OptionNiMH battery pack (option FSL-B31)
Weight (with Battery Option)approx. 8.4 kg (including FSL-B30 and FSL-B31 options)

Environmental and Compliance

ParameterValue
Storage Temperature Range-40 °C to +70 °C
Relative Humidity Range95% at +40 °C (non-condensing)
Electromagnetic Compatibility (EMC)Meets EN 55011 Class B, EN 61326-1
Safety CertificationsEN 61010-1, UL 61010-1, CAN/CSA-C22.2 No. 61010-1
Mechanical Shock and Vibration ComplianceMeets MIL-PRF-28800F Class 3

System & Software

ParameterValue
Operating SystemWindows XP Embedded

Frequency Stability

ParameterValue
OCXO Reference Frequency Aging (Option FSL-B4)1 x 10^-7 per year
OCXO Reference Frequency Temperature Drift (Option FSL-B4)1 x 10^-7 (0°C to +50°C)

Preamplifier Option

ParameterValue
RF Preamplifier Gain (Option FSL-B22)15 dB (nominal)

Optional Interfaces

ParameterValue
Noise Source Control Output (Option FSL-B5)28 V, max. 100 mA (BNC connector)
IF Output (Option FSL-B5)20.4 MHz (BNC connector)
GPIB Interface (Option FSL-B10)IEEE 488 (GPIB) interface, 24-pin

Measurement Options

ParameterValue
Supported Power Sensors (Option FSL-K9 / FSL-B5)R&S NRP-Z11/Z21/Z22/Z23/Z24/Z51/Z55/Z81/Z91

Connectivity

ParameterValue
LAN Port10/100 Base-T (RJ-45)
USB Ports2 × USB 2.0 Type-A (1 front, 1 rear), 1 × USB 2.0 Type-B (rear)
External Display OutputVGA (15-pin D-Sub)
Audio Output Connector3.5 mm mini jack (headphone/speaker)

General Specs

ParameterValue
Warm-Up Time20 min
Recommended Calibration Interval1 year

Environmental

ParameterValue
Maximum Operating Altitude3000 m
Maximum Storage Altitude4600 m

Technology

Heterodyne Spectrum Analyzer

Applications

RF testing, wireless standard demodulation, service, and production